Table 1. Univariate analysis of the variables in overall survival.

Variable	Hazard ratio	95% CI	P value
Tumor size
<5cm	1
5-10cm	3.38	0.70-16.2	0.129
>10cm	2.21	0.46-10.6	0.321
Tumor depth
Superficial	1
Deep	24.0	0.024-24154	0.367
Histologic grade
I	1
II	3.18	0.28-35.1	0.344
III	20.4	2.66-157	0.004
CD109 expression
Negative	1
Positive	5.72	2.13-15.3	0.001

CI: confidence interval